Pitcher is an excellent quality plastic with good fit and finish. The filters fit very well and seem to work as far as PH levels. When tested with supplied testing liquid my water comes to about 9-9.5 PH. I cannot attest to all the other mineral or chemical removals but the taste is excellent. Montreal water always has a chlorine vibe amongst other tastes and I have been drinking Naya for the last 30 years, which has an excellent taste and I can't really taste much difference between them.